hi.. i need help cause i currently own a 9800gtx+ from evga.. i have 25 more days to go before the step up offer expires.. I play games.. i experience some stuttering and lag while playing hellgate london on 1440x900 noAA all very high.. so i was wondering what could be wrong.. i oc my gpu to 792mhz core clock and 1192 mem clock.. i was thinking that my card is too slow to perform other games that might come out.. so i thought i should step up to gtx 260 or 9800gx2.. but i think it would take too long for evga to process it until it comes back to me and i can't take not playing pc.. so what should i do guys? should i step up or just sli? I don't have an sli board but can buy if needed another 9800gtx+...